Armature binding



- 1930- H. K. WHITEHORN 1,773,376

ARMATURE BINDING Filed June 6. 1927 Fig.5 1

. INVE/VTUR A1. Wy/rgflaty A TTORNEY Patented Get. 14, 1930 UNITED STATES PATENT DFFICE HAROLD KENNETH WHITEHORN, F MAIDSTONE, ENGLAND, ASSIGNOR TO TILLING- STEVENS MOTORS LIMITED, 0F MAIDSTONE, KENT, ENGLAND ARMATURE BINDING Application filed June 6, 1927, Serial No. 196,984, and in Great Britain June 14, 1926.

This invention relates to the binding of armatures and the like.

It has for its main object to provide an improved form of binding in which the binding wire is used so that the ends are contiguous, preferably by carrying the binding wire across the recess and back again during the course of applying it, thereby permitting of a firm and convenient connection by uniting the contiguous ends.

Another object is to provide a construction wherein the start and finish of the wire are secured together by means of a turnbuckle with left and right-handed threads; these engage the end portions of the binding wire which are correspondingly screwed.

Another object of this invention (applicable also to other securing means, such for example as splicing or twisting together and soldering the ends) is to provide for the use of a very sparse bottom layer which may even consist of a single skewed turn. The second layer is bound over this turn so as to bring the ends into contiguity. The bottom layer may be embedded into insulation or may be of partially reduced or flattened section.

The turnbuckle may be of any known form such as a short piece of hexagonal tube with or without a central clearing hole, and the two ends tapped respectively left and right handed. Alternatively, the turnbuckle may be of any other suitable section with a flat portion or portions to enable it to be turned by a spanner or holes for the employment of a tommy-bar. Various other forms of turn-buckle may be employed and it may have a central flexible portion to allow for the curve of the armature, being for example, formed with separate ends connected by a pivot joint or Hookes coupling.

The turnbuckle may preferably be of material having high electrical resistance and is preferably sufficiently short to avoid trouble due to the curvature consistently with its being sufficiently long securely to embrace the threads of the binding wire.

Other objects and features of the invention will be clear from the following description of a preferred form thereof and from the 50 claims.

mature represented at 1 within suitable insulation 1 The wire starting near a can be 0 traced around to a a and then across the binding recess to a after which it is bound in close turns back across the recess to 6 b and I).

To apply the turnbuckle 2 the two' ends es of the binding wire may be strained in the usual way and pinned by soldered spots while they are cutto length and the ends screwed and engaged with the turnbuckle.

The details of a convenient form of turnbuckle are shown atFigs; 3, 4 and 5. It is formed with a cylindrical body part 0 and two squared ends (1 and f which have their flats in different planes, as shown, to facilitate turning.

I claim 1. A two layer armature binding wherein the ends of a single continuous binding wire are brought into contiguity and connected together, one layer being sparse and the other 40 closely wound, the turns of the two layers crossing one another.

2. A two layer armature binding wherein the ends of a single continuous binding wire are brought into contiguity and connectedv together, the lower layer consisting of a single skewed turn, and the turns of the upper layer crossing the wire in the lower layer at an angle.

3. A two layer armature binding wherein 90 the ends of a single continuous binding wire are brought together, the ends of the binding wire being threaded right and left-handed, and a turnbuckle adjustably connecting such threaded ends.

4. In an armature having a binding recess, the combination of insulation lining the recess, a binding wire arranged with a sparse lower layer spirally from one side of the recess to the other, and continuing as a single continuous wire to form a closely bound upper layer extending in a close spiral from r the last mentioned side of therecess to the first mentioned side thereof, the turns of the said upper layer repeatedly crossing the said lower layer at an angle, the ends of'the wire having'right and left hand threads cut into them and being brought into co-axial relationship, and aturn-buokleuniting the ends of the wire.

5. A two layer armature binding oonsisting of a single continuous wire whereof the ends are brought into contlguity and tensloning means, whereby said wire is itensionedi' and, whereby also ts ends are connected to- 6; A two layer armature binding consist ingiof a single continuous binding wire, the ends of the wire being brought together in co-axial' relationship, and a turn-buckle adjustably connecting said coaxial ends, whereby said binding may be tensioned and the tension thereof adjusted.

" 7; In an armature having a binding recess, the combination of'insulation lining "the recess, a'binding wire of uniform crosssectional area throughout the length arranged with a Very sparse lower layer and a closely wound upper layer, the wire of the two layers being continuous at one end of the recess,land a wire having its ends rightand left-hand threaded and brought into co-axial 5 relationship, and a-turn-buck-le uniting the ends of the wire, In testimony whereof I affix my slg'nature. i HAROLD KENNETH WHITEHORN. 

